This Unit focuses on special relativity only. Special relativity is a special case of a more general physics. We use only Cartesian coordinate systems. In special relativity we do not consider gravitation, and it is also not a quantum theory. Thus many of the implications of special relativity that are often quoted as if they were general laws do not hold true in more general physics scenarios. Once special relativity is understood, one may move on to a more general case of physics known as general relativity For those that are ready for this step we have created a section on general relativity -Modern Relativity.

Special Relativity Preface